The Collaborative International Dictionary of English v.0.48:

Cannonade \Can`non*ade"\, n. [F. Canonnade; cf. It. cannanata.]
   1. The act of discharging cannon and throwing ball, shell,
      etc., for the purpose of destroying an army, or battering
      a town, ship, or fort; -- usually, an attack of some
      continuance.
      [1913 Webster]

            A furious cannonade was kept up from the whole
            circle of batteries on the devoted towm. --Prescott.
      [1913 Webster]

   2. Fig.; A loud noise like a cannonade; a booming.
      [1913 Webster]

            Blue Walden rolls its cannonade.      --Ewerson.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cannonade \Can`non*ade"\, v. t. [imp. & p. p. Cannonade; p.
   pr. & vb. n. Cannonading.]
   To attack with heavy artillery; to batter with cannon shot.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cannonade \Can`non*ade"\, v. i.
   To discharge cannon; as, the army cannonaded all day.
   [1913 Webster]

WordNet (r) 3.0 (2006):

cannonade
    n 1: intense and continuous artillery fire [syn: cannonade,
         drumfire]
    v 1: attack with cannons or artillery

Moby Thesaurus II by Grady Ward, 1.0:

58 Moby Thesaurus words for "cannonade":
   aim at, air raid, antiaircraft barrage, barrage, blast, blitz,
   blitzkrieg, bomb, bombard, bombardment, boom, booming, box barrage,
   broadside, burst, cannon, cannonry, commence firing,
   creeping barrage, drumfire, emergency barrage, enfilade,
   fire a volley, fire at, fire upon, fusillade, growl, grumble, hail,
   lightning attack, lightning war, mortar, mortar barrage,
   normal barrage, open fire, open up on, peal, pepper, pop at, rake,
   roar, roll, rumble, salvo, shell, shoot, shoot at, shower, snipe,
   snipe at, spray, standing barrage, strafe, strafing, take aim at,
   torpedo, volley, zero in on